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Microchip Technology MIC27600YJL-TR
- Part No.:
- MIC27600YJL-TR
- Manufacturer:
- Microchip Technology
- Package:
- 28-PowerVQFN
- Datasheet:
-
MIC27600YJL-TR.pdf
- Description:
- IC REG BUCK ADJ 7A 28QFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,414
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Product details
Overview
MIC27600YJL-TR from Micrel is a synchronous DC-DC buck regulator with Hyper Speed Control™ architecture, delivering up to 7A output current across 4.5V–36V input range and adjustable 0.8V–5.5V output. It features ±1% feedback accuracy, 300kHz fixed switching frequency, and operates in a 28-pin 5mm × 6mm MLF® package. Used in high-voltage-to-low-voltage point-of-load conversion for networking infrastructure and embedded power systems.
For engineers reviewing the MIC27600YJL-TR datasheet, MIC27600YJL-TR pinout, MIC27600YJL-TR application, or MIC27600YJL-TR equivalent, key selection considerations include its adaptive on-time control enabling fast transient response without external compensation, Any Capacitor™ stability support, internal 7A MOSFETs with 25mΩ/10mΩ RDS(on), and thermal shutdown with 155°C trip point.
Technical Context
The MIC27600YJL-TR implements a digitally modified adaptive on-time control architecture that combines fixed-frequency operation (300kHz nominal) with ultra-fast load transient response by dynamically adjusting off-time while estimating on-time via VOUT/VIN ratio. Its control loop senses output voltage ripple at the FB pin to trigger switching, eliminating need for slope compensation or external current-sense resistors.
Protection is integrated at silicon level: foldback current limiting triggered by low-side MOSFET RDS(on) sensing, hiccup-mode short-circuit response, internal 6ms soft-start, undervoltage lockout (2.7V typical), and thermal shutdown with 10°C hysteresis. The device supports safe startup into pre-biased outputs and requires no external compensation components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5V to 36V - Enables direct integration into 24V/28V industrial and telecom rails without pre-regulation. |
| Output Current | Up to 7A continuous - Sufficient for powering FPGAs, ASICs, and multi-core processors in compact layouts. |
| Feedback Accuracy | ±1% over 0°C–85°C - Ensures tight regulation for sensitive analog and mixed-signal circuitry. |
| Switching Frequency | 300kHz (±25kHz) - Balances EMI control, inductor size, and efficiency across wide VIN/VOUT ratios. |
| Output Voltage Range | Adjustable 0.8V–5.5V (VHSD ≤ 28V); 0.8V–3.6V (VHSD ≤ 36V) - Covers core logic, I/O, and analog supply requirements. |
| Internal MOSFET RDS(on) | High-side: 25mΩ; Low-side: 10mΩ - Minimizes conduction loss and enables >95% peak efficiency at 3.3V/5A. |
| Junction Temp Range | −40°C to +125°C - Qualified for extended-temperature industrial and automotive under-hood applications. |
Pinout & Package
Package: 28-pin 5mm × 6mm MLF® (exposed thermal pad), Pb-free, RoHS-compliant. Thermal resistance θJA = 36°C/W with standard 2-layer PCB layout.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 13–19 (PVIN) | High-side MOSFET drain input | Primary power input path; requires local ceramic bypassing to PGND; shared among 7 pins to reduce trace inductance and IR drop. |
| 24 (EN) | Enable control input | CMOS-compatible logic enable; floating or high ≥1.2V enables regulation; low ≤0.4V places IC in shutdown (IQ ≈ 0.7mA). |
| 25 (FB) | Feedback reference input | Senses divider output; regulated to 0.8V ±1%; determines output voltage via R1/R2 ratio; requires ≥20mVpp ripple for stable operation. |
| 26 (SGND) | Signal ground reference | Must connect directly to clean signal ground plane; isolated from PGND to prevent noise coupling into control loop. |
| 27 (VDD) | Bias supply input | 4.5V–5.5V internal bias rail; requires 2.2µF ceramic cap to PGND; must power up concurrently with or after PVIN for correct soft-start. |
| 2,5,6,7,8,21 (PGND) | Power ground return | Low-impedance return for both MOSFETs and input/output capacitors; must be routed as single-point star to minimize ground bounce. |
| 22 (CS) | Current sense node | Monitors low-side MOSFET during OFF-time for overcurrent detection; high dv/dt node-must be kept away from sensitive traces. |
| 20 (BST) | Bootstrap capacitor connection | Drives high-side gate; requires 0.1µF ceramic cap to SW; Schottky diode from VDD ensures charge replenishment. |
| 4,9,10,11,12 (SW) | Switch node output | Connection between high-side source and low-side drain; carries full switching waveform; critical for EMI and thermal management. |
| 23 (VIN) | Secondary bias input | Supplies auxiliary circuitry; requires local bypass to SGND; not used for main power path. |
| 1,3,28 (NC) | No-connect | Unbonded die pads; must remain unconnected and un-routed on PCB. |
Key Features
| Feature | Design Value |
|---|---|
| Hyper Speed Control™ architecture | Enables <36V→0.8V conversion with <10µs transient recovery and reduced output capacitance vs. traditional voltage-mode controllers. |
| Any Capacitor™ stability | Stable with zero-ESR ceramic or high-ESR electrolytic output caps-eliminates need for ESR tuning or damping networks. |
| Integrated 7A synchronous MOSFETs | Eliminates external power switches and gate drivers; reduces BOM count, footprint, and layout complexity. |
| Internal soft-start (6ms) | Prevents inrush current damage to input capacitors and upstream supplies during power-up or hot-plug events. |
| Hiccup-mode short-circuit protection | Shuts down and auto-retries during hard shorts-protects IC and load without requiring manual reset or external circuitry. |
Applications
| Telecom Point-of-Load | Industrial FPGA Power |
|---|---|
Use Scenario: Providing 1.2V/5A core supply to Xilinx Artix-7 FPGA in remote radio unit with 28V backplane input. IC Role / Device Role / Timing Role: Primary synchronous buck regulator delivering tightly regulated core voltage with fast dynamic response to logic state changes. Use Value: Enables single-chip solution replacing discrete controller + dual MOSFETs, reducing board area by >40% and improving thermal performance via exposed thermal pad. | Use Scenario: Generating 3.3V/6A I/O supply for industrial PLC CPU module operating from 24V DC field bus. IC Role / Device Role / Timing Role: High-efficiency step-down converter supporting wide input variation and maintaining regulation during brownout conditions. Use Value: Undervoltage lockout (2.7V) and −40°C to +125°C operation ensure reliable startup and sustained function in harsh factory environments. |
| Networking Router Core Supply | Set-Top Box SoC Power |
Use Scenario: Delivering 0.95V/4.5A to Broadcom BCM6858 SoC in enterprise gigabit router with 48V PoE-derived input. IC Role / Device Role / Timing Role: Adaptive on-time buck regulator managing rapid load transients from packet processing bursts. Use Value: Hyper Speed Control™ achieves <15mV output deviation under 3A/µs load step-prevents SoC reset or timing violations. | Use Scenario: Supplying 1.1V/3.2A to ARM-based media processor in cable set-top box powered from 12V wall adapter. IC Role / Device Role / Timing Role: Compact, thermally efficient DC-DC converter meeting stringent standby power (<100mW) and thermal envelope requirements. Use Value: 95% peak efficiency at 3.3V/5A and internal MOSFETs eliminate gate drive losses-reducing heatsink need and system cost. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MPQ4470AGL-Z | 4.5V–60V input, 7A, 500kHz, integrated MOSFETs (22mΩ/11mΩ), but requires external compensation and lacks Any Capacitor™ stability. | Better suited for higher-VIN (>36V) designs; less tolerant of low-ESR ceramic caps without ripple injection. | Select MPQ4470AGL-Z only when input exceeds 36V or higher switching frequency is required; verify loop stability with target output cap. |
| TPS54560BQPWPRQ1 | 4.5V–60V input, 5A, 100kHz–2.5MHz adjustable freq, external MOSFETs, requires compensation network and current-sense resistor. | Offers greater design flexibility and higher temp rating (−40°C to +150°C), but increases component count and layout complexity. | Choose TPS54560BQPWPRQ1 for AEC-Q100 automotive qualification needs or where programmable frequency and external FET control are mandatory. |
Compared with MPQ4470AGL-Z and TPS54560BQPWPRQ1, the MIC27600YJL-TR provides superior ease-of-use through internal compensation, Any Capacitor™ compatibility, and fixed 300kHz operation-reducing design cycle time and validation effort for mid-power industrial and networking applications.
Availability
MIC27600YJL-TR is available at Aetrix Electronics and suitable for telecom infrastructure, industrial embedded systems, and consumer electronics requiring stable component supply, long-term lifecycle support, and consistent parametric performance across production batches.
Supply support for MIC27600YJL-TR includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Micrel Inc. was a fabless semiconductor company specializing in analog, power management, and timing solutions before its acquisition by Microchip Technology in 2015. Known for innovation in DC-DC regulation and SuperSwitcher™ architectures.
The MIC27600YJL-TR belongs to Micrel's SuperSwitcher II™ family, designed specifically for high-input-voltage, high-current point-of-load conversion in space-constrained, thermally demanding applications such as routers, base stations, and industrial controllers.
FAQ
What is the recommended output capacitor type for MIC27600YJL-TR?
The MIC27600YJL-TR supports Any Capacitor™ stability, meaning it works reliably with ceramic, low-ESR aluminum electrolytic, OS-CON, and POSCAP types. For best transient response and minimal output ripple, use X5R/X7R ceramic capacitors totaling ≥47µF with ≤5mΩ ESR. If using ultra-low-ESR ceramics, apply ripple injection to ensure ≥20mVpp at FB per datasheet guidelines-MIC27600YJL-TR requires this for proper adaptive on-time triggering.
Does MIC27600YJL-TR require external compensation components?
No, the MIC27600YJL-TR features fully internal compensation-no external resistors or capacitors are needed for loop stability. This simplifies layout, reduces BOM count, and eliminates tuning effort. The adaptive on-time architecture inherently maintains stability across all supported output capacitors and load conditions, as confirmed in the MIC27600YJL-TR datasheet Section 8.2.2.
Can MIC27600YJL-TR safely start up into a pre-biased output?
Yes, the MIC27600YJL-TR explicitly supports safe startup into a pre-biased output-a critical feature for hot-swap and redundant power systems. During startup, the controller monitors the FB pin and delays high-side MOSFET activation until the output voltage falls below the programmed regulation level, preventing reverse current flow and potential damage to downstream circuitry. This behavior is documented in MIC27600YJL-TR datasheet Section 9.3.7.
What is the minimum off-time specification for MIC27600YJL-TR and why does it matter?
The MIC27600YJL-TR has a minimum off-time (tOFF(min)) of 360ns, which sets the maximum achievable duty cycle (~87%) and ensures sufficient time to recharge the BST capacitor. Operating near this limit-especially at high VIN/VOUT ratios-can cause bootstrap voltage droop and high-side driver failure. Therefore, MIC27600YJL-TR should not be used in applications requiring >87% duty cycle for extended periods, as specified in MIC27600YJL-TR datasheet Electrical Characteristics Table.
How does MIC27600YJL-TR implement overcurrent protection without a sense resistor?
The MIC27600YJL-TR uses the RDS(on) of its internal low-side N-channel MOSFET (10mΩ typical) to sense peak inductor current during the OFF-time. This eliminates external sense resistors, saving board space and efficiency. When sensed current exceeds the foldback threshold (e.g., ~15A at VFB = 0V), the device enters hiccup mode-latching off, waiting, then retrying-to protect against sustained shorts. This method is detailed in MIC27600YJL-TR datasheet Section 9.3.5.
MIC27600YJL-TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- Hyper Speed Control®, SuperSwitcher II™
- Package/Case:
- 28-PowerVQFN
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 4.5V
- Voltage - Input (Max):
- 36V
- Voltage - Output (Min/Fixed):
- 0.8V
- Voltage - Output (Max):
- 5.5V
- Current - Output:
- 7A
- Frequency - Switching:
- 300kHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 28-QFN (5x6)
MIC27600YJL-TR FAQ
1.How can I place an order for MIC27600YJL-TR through Aetrix?
Please submit a Request for Quotation (RFQ) for MIC27600YJL-TR on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for MIC27600YJL-TR reliable?
The price and inventory of MIC27600YJL-TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MIC27600YJL-TR is usually 5 days.
3.What payment methods are accepted for MIC27600YJL-TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MIC27600YJL-TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MIC27600YJL-TR?
MIC27600YJL-TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MIC27600YJL-TR order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for MIC27600YJL-TR?
For technical support, including MIC27600YJL-TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MIC27600YJL-TR requirements.
6.How does Aetrix verify that MIC27600YJL-TR is sourced from the original manufacturer or authorized distributors?
All MIC27600YJL-TR products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that MIC27600YJL-TR meets industry standards.
7.What is the process for return or replacement of MIC27600YJL-TR?
All MIC27600YJL-TR units undergo pre-shipment inspection (PSI). If there is an issue with MIC27600YJL-TR, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The MIC27600YJL-TR part is unused and in its original packaging.
Return procedure for MIC27600YJL-TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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